K5TRA 144, 432, 902, 1296 and 2304 Station



K5TRA 222 MHz and 10 GHz Station



K5TRA 50 MHz Station (also HF)




WEAK SIGNAL OPERATION

The World Above 50 MHz    - Austin Summerfest 2015 (RMG Forum)

Fun with Roving    - Austin Summerfest 2015 (RMG Forum)



K5TRA ANTENNAS

6M Phase Steerable 2x2 Endfire Array    - RMG & NTMS meeting 2018 (Belton)

Circular Collinear Omnidirectional Array    - RMG & NTMS meeting 2018 (Belton)

Helical Collinear Omnidirectional Array    - QEX 2011 Nov/Dec

Offset dish feed calculations    - K5TRA analysis

Antenna Farm    - K5TRA attic antennas & remote amplifiers

Antenna Farm video    - Video tour of K5TRA attic antennas & remote amplifiers (ZIP of mp4)



TRANSVERTERS

10 GHz    - Austin Summerfest 2016 (RMG Forum)

2304 MHz    - RMG meeting 2016 (Bee Cave)

1296 MHz    - Old 2010 transverter

1296 MHz    - New 2020 transverter

902 MHz    - Old 2010 transverter

902 MHz    - New 2020 transverter

222 MHz    - 2011 transverter



BEACONS


1296 MHz Beacon    - Roadrunners Microwave Group

144, 432, and 902 MHz Beacons    - Roadrunners Microwave Group

50 MHz Beacon    - Guadalupe Valley Radio Club

222 MHz Beacon    - K5TRA: This was the prototype for the other bands thru 23 CM



DESIGN

Board Level Impedance Matching    - Smith Chart 1296 MHz design example

Broadband Impedance Matching    - Synthesis techniques with examples

Broadband Transformers    - Ruthroff original paper

Transmission-Line Transformers    - Ruthroff, Guanella, etc.


TECH LIBRARY    - Many more technical papers on all facets of design

DESIGN AID SOFTWARE    - Downloadable applets for RF design by K5TRA



HOMEBREW

222 MHz Harris PA    - Homebrew project

RF Keyed DC Sequencer    - Homebrew project



902 & 1296 MHz Low Noise Preamps    - Homebrew project

902 & 1296 MHz Remote LNAs    - Homebrew project

902 & 1296 MHz Remote PA & LNAs    - Homebrew project

1296 MHz Remote PA & LNA    - Homebrew project

1296 MHz PreDriver (+31 dBm)    - Homebrew project


10 GHz PA Design    - Homebrew project (design)

10 GHz PA Results    - Homebrew project (part-II)

10 GHz LNA    - Homebrew project

10 GHz PA & LNA Construction Tips    - Homebrew project (part-III)





K5TRA Station

Weak signal operation from 6M through 1296 MHz. and 10 GHz Shown are 2 IC-820H transceivers. One is used for 144 MHz and 432 MHz. The other is used as IF radio for 902 MHz and 1296 MHz transverters. Six meter operation (and HF) is provided by an Elecraft K3. The IF radio for the 222 MHz and the 10 GHz transverters is a Yaesu FT2000. All of these transverters have been designed and built from scratch by K5TRA. The latest addition to the station is 2304 MHz. That transverter is a Kuhne (DB6NT) MKU23G2 with a 144 MHz IF. You may also find the link to my "Antenna Farm" interesting.